TM 5-4220-231-14&PAPPENDIX BMAINTENANCE ALLOCATION CHARTSection I. INTRODUCTIONB-1. GENERAL.a. This section provides a general explanation of all maintenance and repair functions authorized at variousmaintenance levels.b. The Maintenance Allocation Chart (MAC) in Section II designates overall authority and responsibility forthe performance of maintenance functions on the identified end item or component The application of themaintenance functions to the end item or component will be consistent with the capacities and capabilities of thedesignated maintenance levels.c. Section III lists the tools and test equipment (both special tools and common tool sets) required for eachmaintenance function as referenced from Section II.d. Section IV contains supplemental instructions and explanatory notes for a particular maintenance function.B-2. MAINTENANCE FUNCTIONS.a. Inspect. To determine the serviceability of an item by comparing its physical, mechanical, and or electricalcharacteristics with established standards through examination (e.g., by sight, sound, or feel).b. Test. To verify serviceability by measuring the mechanical, pneumatic, hydraulic, or electricalcharacteristics of an Rem and comparing those characteristics with prescribed standards.c. Service. Operations required periodically to keep an item in proper operating condition, i.e., to clean(includes decontaminate, when required), to preserve, to drain, to paint, or to replenish fuel, lubricants, chemicalfluids, or gases.d. Adjust. To maintain or regulate, within prescribed limits, by bringing into proper or exact position, or bysetting the operating characteristics to specified parameters.e. Aline. To adjust specified variable elements of an item to bring about optimum or desired performance.f. Calibrate. To determine and cause corrections to be made or to be adjusted on instruments or testmeasuring, and diagnostic equipments (TMDE) used in precision measurement. Consists of comparisons of twoinstruments, one of which is a certified standard of known accuracy, to detect and adjust any discrepancy in theaccuracy of the instrument being compared.g. Remove/install. To remove and install the same item when required to perform service or othermaintenance functions. Install may be the act of emplacing, seating, or fixing into position a spare, repair part, ormodule (component or assembly) in a manner to allow the proper functioning of an equipment or system.h. Replace. To remove an unserviceable item and install a serviceable counterpart in its place. "Replace"is authorized by the MAC and is shown as the 3d position code of the SMR code.B-1